Origami is a new Plug-in and Macro set for Quartz Composer that expands it’s functionality as a design tool. Launched recently by the Facebook Design Team ( http://origami.facebook.com/ ) it provides a set of tools intended to make interaction prototyping easier.
The main Plug-in adds a few nice features and finally brings Retina Support to the QC Editor. As well as the Plug-in it also install a bunch of macros that replicate a lot of in built functionality and repackages them in a more user friendly manner. There is also a bunch of example files to get show it all in action.
It look like the project could bring some new people to the world of Quartz Composer which will be a great thing. There has already been some updates to the github page as users have posted about bugs.
Check out https://github.com/facebook/origami for the latest build
http://facebook.github.io/origami/ for the latest installer.
Also worth checking out is this interview with one of the Facebook design team talking about their ideas behind using Quartz Composer.